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가로수 수종별 잎의 미세먼지 축적량 및 금속 원소 함량 평가

권선주 ( Seon-ju Kwon ) , 차승주 ( Seung-ju Cha ) , 이주경 ( Joo-kyung Lee ) , 박진희 ( Jin Hee Park )
4,500
초록보기
식물 종마다 잎에 미세먼지(PM)를 흡착하는 정도가 서로 다르며 잎을 통해 PM을 흡수할 수 있는 것으로 알려져 있다. PM에 포함된 중금속은 인체 및 식물에 영향을 미칠 수 있으며 입자 크기에 따라 미치는 영향이 다를 수 있다. 따라서 충북대학교 내 도로변에 위치한 회양목 (Buxus koreana), 주목 (Taxus cuspidate), 철쭉 (Rhododendron yedoense), 이팝나무 (Chionanthus retusa)와 같은 가로수 잎에 축적된 PM을 입자 크기(PM>10 및 PM2.5-10)에 따라 분획 및 정량화하였다. 잎에 축적된 크기 별PM의 금속 농도는 유도 결합 플라스마 질량 분석법(ICP-MS)으로 분석하였다. 나무 잎 표면에 축적된 PM>10의 질량은 6.11-32.7 μg/cm2, PM2.5-10의 질량은 0-14.8 μg/cm2이었다. 잎 표면에 홈이 있고 털을 갖고 있는 철쭉이 작은 PM 입자를 잘 유지하고 있었으며 광택이 있는 잎 표면을 가진 주목과 회양목은 많은 PM을 축적하고 있었다. PM은 Al, Ca, Mg, Fe와 같은 지각 구성 원소와 Cu, Pb, Zn와 같은 중금속을 포함하고 있었다. 지각 구성 원소의 농도는 PM>10 입자에서 더 높았고, 중금속농도는 PM2.5-10 입자에서 상대적으로 더 높았다. 잎에 흡수된 Mn, Cd, Cu, Ni, Pb, Zn과 PM2.5-10의 중금속 농도는 유의한 상관관계를 보여 나무 잎을 통해 PM이 흡수될 수 있음을 확인하였다.

국내 미이용 바이오매스 순환유동층 연소에서 NOx 저감을 위한 air-staging 효과

윤상희 ( Sang-hee Yoon ) , 백건욱 ( Geon-uk Beak ) , 문지홍 ( Ji-hong Moon ) , 조성호 ( Sung-ho Jo ) , 박성진 ( Sung-jin Park ) , 김재영 ( Jae-young Kim ) , 서명원 ( Myung-won Seo ) , 윤상준 ( Sang-jun Yoon ) , 윤성민 ( Sung-min Yoon ) , 이재구 ( Jae-goo Lee ) , 김주식 ( Joo-sik Kim ) , 문태영 ( Tae-young Mun )
5,100
초록보기
미세먼지 전구체인 질소산화물(NOx)에 대한 대기배출부과금 제도가 2020년부터 국내에 도입 및 시행됨에 따라 이를 저감하기 위한 경제적인 연소기술 개발은 매우 시급한 실정이다. 본 연구에서는 해외 우드펠릿 대체재로서 REC(Renewable Energy Certificates) 확보가 가능한 국내 미이용 산림 바이오매스를 연료로 하여 0.1 MWth급 순환유동층 연소 설비에서 NOx 저감을 위한 air-staging 효과를 고찰하였다. 운전 변수로는 air-staging 적용 유무, 3차 공기공급 높이(6.4 m, 8.1 m, 9.4 m) 그리고 air-staging 비율(1차 공기:2차 공기:3차 공기=91%:9%:0%, 82%:9%:9%, 73%:9%:18%) 변화이며 운전 변수에 대한 배기가스 내 NO와 CO 농도, 연소로 높이별 온도와 압력 프로파일, 포집된 비산재(fly ash) 내 미연탄소 함량과 연소효율을 분석하였다. 3차 공기를 가장 높은 9.4 m에서 공급한 air-staging 운전 시NO 농도는 100.7 ppm으로 air-staging을 적용하지 않은 운전 조건(148.8 ppm)보다 32.3% 감소하지만 CO 농도는 오히려 52.2 ppm에서 99.8 ppm으로 91% 증가하였다. 더불어, NO 농도의 저감을 위한 환원영역과 CO 농도의 저감을 위한 산화영역 확보를 위해 3차 공기 공급 높이를 6.4 m로 유지하며 3차 공기 공급량을 늘리고 1차 공기 공급량을 낮춘air-staging 운전 조건(73%:9%:18%)에서는 NO와 CO 농도가 각각 90.8 ppm과 66.1 ppm으로 air-staging 적용 조건 중 가장 감소되는 것을 확인하였다. 이러한 최적 운전 조건에서 연소효율 역시, air-staging을 적용하지 않은 운전 조건의 연소효율(98.3%) 보다 높은 99.3%임을 확인하였다.

고위험임신의 위험 요인과 미세먼지와의 연관성

유수인 ( Soo-in You ) , 김주희 ( Ju Hee Kim ) , 신혜숙 ( Hye Sook Shin ) , 강대용 ( Dae Ryong Kang )
4,500
키워드보기
초록보기
Purpose: High-risk pregnancy, resulting in major complications, such as abortion, gestational hypertension, and preterm labor, are on the rise, requiring intervention. Increased concentration of particulate matter that is 10 μg per cubic meter or less in diameter (PM10) due to increased air pollution and industrialization has recently been noted as a risk factor for health problems, and prior studies have reported that PM10 is related to abortion, gestational hypertension, and preterm labor. Methods: This study used data from the Korean medical panel between 2008 and 2016 to identify 879 women with normal pregnancies and 301 women diagnosed with high-risk pregnancies. The association between high-risk pregnancy and PM10 was analyzed using the annual average regional concentration during the same period by the Korea Environment Corporation. Results: At 35 years of age or older, the risk of abortion (p<0.001; 95% confidence interval [CI], 1.43-2.71) and preterm labor increased (p<0.05; 95% CI, 0.33-0.90). Married pregnant women were at a high risk of preterm labor (p<0.05; 95% CI, 0.25-0.98), and the prevalence of gestational hypertension was high in the metropolitan area (p<0.05; 95% CI, 12.09-25.93). On comparing the average annual concentration of particulate matter according to the level of atmospheric ventilation of the Korea Environment Corporation using a cutoff of ≤50 μg/m3, the probability of preterm labor was 2.2 times higher in groups exposed to particulate matter concentration of ≥50 μg/m3 (p<0.01; 95% CI, 1.49-3.25). Conclusion: PM10 was related to preterm labor, and the risk of preterm labor wa s high if the average annual concentration of PM10 in the individual’s residential area exceeded 50 μg/m3.

지역경제 성장이 지역간 교역과 체화된 미세먼지 배출에 미치는 영향

김의준 ( Kim Euijune ) , 이호준 ( Hojune Lee )
6,200
초록보기
본 연구의 목적은 우리나라의 지역경제 성장이 지역간 교역 및 미세먼지 배출에 미치는 영향을 분석하는 것이다. 중력모형을 기반으로 한 2단계최소자승법으로 지역경제 성장과 지역간 교역량 및 체화된 미세먼지량의 관계를 추정하고 분석하였다. 분석한 결과, 지역간 교역량과 체화된 미세먼지량은 이출지역과 이입지역의 산출량에 비례하였다. 체화된 미세먼지 배출량이 이입지역의 산출량에 비례하는 것은 생산지역뿐만 아니라 소비지역도 미세먼지 배출에 책임이 있음을 보여준다. 또한, 최종재에서 교역량과 미세먼지 배출의 거리탄력성이 더 컸다. 이는 중간재에 체화된 미세먼지의 배출은 거리보다 산업의 집적, 에너지 소비구조와 같이 다른 요인의 영향을 더 많이 받음을 의미한다. 마지막으로, 지역별 경제성장 시나리오를 바탕으로 미세먼지 배출 증가율이 교역량 증가율보다 큰 지역과 작은 지역이 구분되었다. 이 결과는 미세먼지 배출이 경제성장뿐만 아니라 지역의 산업적 특성에 따라 달라짐을 의미한다. 본 연구의 결과는 미세먼지 저감정책을 시행할 때, 정부가 미세먼지 배출에 관한 특성을 고려해야 함을 시사한다.

주물공장의 레이들용 고효율 이동형 집진장치 개발

홍준호 ( Jun Ho Hong ) , 이상환 ( Sang Hwan Lee )
4,500
초록보기
환경오염방지와 에너지 소비 절감에 대한 기술 개발의 요구는 이미 사회 전체의 문제가 되고 있고, 주물산업에서의 환경과 에너지 관련 기술 개발 또한 최근 중요한 문제로 부상하고 있다. 본 논문에서는 주조공정에서 발생하는 분진의 친환경적인 집진처리를 위한 분진 흡입 시스템을 개발하고 기존의 건옥식 고출력 설비의 집진 효율과 비교 및 검토하였다. 넓은 범위를 집진하는 건옥식 방식은 에너지 및 집진 효율이 떨어지고, 건물 높이에 따라 효과를 보지 못 할 수도 있다는 단점이 있다. 또한 주물공장에서 발생하는 분진은 용해 후 출탕, 레이들 이송, 주입 공정까지 미세먼지의 발생원 위치가 연속적으로 바뀌기 때문에 효과적인 집진을 위한 국부적 범위의 이동식 집진장치의 개발이 요구된다. 이에, 본 논문에서는 이동하는 분진원에 효과적으로 대응할 수 있도록 크레인, 호이스트, 모노레일 등의 레이들 이송 장비에 집진 설비를 설치하고, 집진 특성을 평가하였다. 본 논문에서 개발한 이동형 집진 장치는 주물 생산 현장의 에너지 절감과 환경보호 측면에서 의의가 있으며, 타 산업 현장의 적용도 가능하다고 판단할 수 있다.

미세먼지 관리 모바일 어플리케이션의 질 평가

이재빈 ( Jae Bin Lee ) , 우혜경 ( Hyekyung Woo )
4,500
키워드보기
초록보기
This study aims to identify the contents characteristics of fine dust management apps currently released in Korea and evaluate the quality level. Methods: We found 400 apps to search for keywords related to fine dust, and 30 apps that meet certain criteria were selected as the final research subjects. It describes the main content status of 30 apps. Additionally, we evaluate the quality level of the app by utilizing the mobile application rating scale (MARS). We analyze the correlation between MARS Score, consumer score, and number of reviews. Results: Most fine dust apps were providing contents that provide fine dust concentration based on global positioning system (GPS). According to the MARS evaluation, engagement was low in average score, and in aesthetic, the gap between apps was large. The correlation analysis between the scores was not significant. Conclusions: It is necessary to develop differentiated contents such as personal health records and monitoring in order to increase the motivation and sustainability of using the fine dust mHealth app.

육계사 내 작업자의 미세먼지 노출량 현장모니터링

서효재 ( Seo Hyo-jae ) , 오병욱 ( Oh Byung-wook ) , 김효철 ( Kim Hyo-cher ) , 신소정 ( Sin So-jung ) , 서일환 ( Seo Il-hwan )
5,100
초록보기
As domestic meat consumption increases, the broiler production industry has been larger and denser. The concentration of particulate matter (PM) and harmful gases generated is also increasing inside livestock house. However, the current research status of PM exposed to farm workers and the health effects are in the early stage. To understand PM concentration affecting workers in the broiler house, field monitoring was conducted according to its size distributions. Concentrations of PM10, PM2.5, and TD (Total Dust) were monitored using personal air samplers with teflon filter during working and moving periods considering the ventilation systems of 6 broiler houses. The purpose of this study is to monitor the PM concentration in the experimental broiler houses operated by forced ventilation system generally used in Korea and to evaluate the regional concentrations through airflow pattern. The PM concentrations were increased from inlet to outlet vents resulting in 1,872 of TD, 1,385 of PM10, and 209 ㎍/㎥ of PM2.5, respectively. The TD and PM10 concentrations were increased when the workers and broilers were moving. Among them, the particle size that occupied the largest amount of PM was 13.75 ㎛. These results suggest that personal protection equipments are important to reduce the health effect from PM inhalation.

강제환기식 양돈시설의 암모니아 및 미세먼지 배출계수 산정

박진선 ( Park Jinseon ) , 정한나 ( Jeong Hanna ) , 홍세운 ( Hong Se-woon )
4,500
초록보기
Emission factors for ammonia and particulate matters (PMs) from livestock buildings are of increasing importance in view of the environmental protection. While the existing emission factors were determined based on the emission inventory of other countries, in situ measurement of emission factors is required to construct an accurate emission inventory for Korea. This study is to report measurements of ammonia and PMs emissions from mechanically-ventilated pig houses, which are common types of pig barns in Korea. Ventilation rates and concentrations of ammonia and PMs were measured at the ventilation outlets of a weaner unit, a growing pig unit and a fattening pig unit to calculated the emission factors. The PMs emission was characterized with different aerodynamic diameters (PM2.5, PM10, and total suspended particulates (TSP)). The measured ammonia emission factors for weaners, growing pigs and fattening pigs were 0.225, 0.869 and 1.679 kg animal-1 yr-1, respectively, showing linear increase with pigs’ age. The PMs emission factors for three growing stages were 0.023, 0.237 and 0.241 kg animal-1 yr-1, respectively for TSP, 0.017, 0.072 and 0.223 kg animal-1 yr-1, respectively for PM10, and 0.011, 0.016 and 0.151 kg animal-1 yr-1, respectively for PM2.5. PMs emissions were increased with pigs’ age due to increasing feed supply and animal movement. The measured emission factors were smaller than those of the existing emission inventory indicating that the existing ones overestimate the emissions from pig buildings and also suggesting that long-term in situ monitoring at various livestock buildings is required to construct the accurate emission inventory.

미세먼지 정보가 돼지고기 수요에 미친 영향 추정

강진규 ( Jingyu Kang ) , 김관수 ( Kwansoo Kim )
5,900
초록보기
Since 2014, fine dust particles have emerged as one of major social issues in South Korea. The density of fine dust has been announced in the weather forecast since then, and the number of related media reports has rapidly increased. As the hazard of fine dust has been recognized, comfort food consumption has begun in order to reduce anxiety. Pork belly is a typical comfort food due to the myth that the fat in it helps release fine dust. The research question is how consumption behavior changes, as the fine dust problem is taken seriously under condition that a groundless belief, that pork belly is effective in getting fine dust out of the body, is widespread. It is assumed that the more seriously the problem is taken, the more pork belly consumption occurs. The Almost Ideal Demand System (AIDS) is used to test the hypothesis. The relationship between pork belly consumption and the density of fine dust was previously analyzed. This study additionally finds the effect of the number of media reports regarding fine dust particles. Note that fine dust has been recognized as a serious problem since 2014, when related reports have remarkably increased. Using the AIDS model, we examined how the expenditure share of pork belly, pork excluding pork belly, beef, chicken, or other meat depends on explanatory variables such as the price of each item, the density of fine dust, and the proportion of news reports. We found that, when the ratio of related reports increases, the expenditure share of pork belly grows. An elasticity analysis shows that consumption of pork belly increases, as fine dust-related reports ratio is higher. When the ratio increases by 10%, consumption of pork belly increases by 0.33%. This phenomenon is based on the myth, which people believe in that pork belly is effective in getting fine dust out of the body. The problem is that belief lacks scientific evidence. If consumption of pork belly increases because of inaccurate information, consumers may fail to achieve maximum utility.

미세먼지 배출원과 취약계층 분포추정을 통한미세먼지저감 녹지입지 선정연구 -서울시 성동구를 대상으로-

신예은 ( Shin Ye-eun ) , 박진실 ( Park J In-sil ) , 김수연 ( Kim Su-yeon ) , 이상우 ( Lee Sang-woo ) , 안경진 ( An Kyung-j In )
5,600
초록보기
The study aims to propose a locating method of green space for reducing Particulate Matter (PM) in ambient air in conjunction with its source traces and vulnerable groups. In order to carry out the aims and purposes, a literature review was conducted to derive indicators of vulnerable area to PM. Based on the developed indicators, the vulnerable areas and green spaces creation strategies for each cluster were developed for the case of Seongdong-gu, Seoul. As a result, six indicators for vulnerability analysis were came out including the vulnerable groups (children's facilities, old people's facilities), emission sources (air pollutant emission workplaces, roads), and environmental indicators (particulate matter concentration, NDVI). According to the six selected indicators, the target area was divided into 39 hexagons and analyzed to result the most vulnerable areas to particulate matter. As a result of comprehensive vulnerability analysis, the Seongsu-dong area was found to be the most vulnerable to partic ulate matter, and 5 clusters were derived through k-means cluster analysis. Cluster 1 was analyzed as areas that most vulnerable to particulate matter as a result of the comprehensive analysis, therefore urgent need to create green spaces to reduce particulate matter. Cluster 2 was areas that mostly belonged to the Han River. Cluster 3 corresponds to the largest number of hexagons, and since many vulnerable groups are distributed, it was analyzed as a cluster that required the creation of a green spaces to reduce particulate matter, focusing on facilities for vulnerable groups. Three hexagons are included in cluster 4, and the cluster has many roads and lacks vegetation in common. Cluster 5 has a lot of green spaces and is generally distributed with fewer vulnerable groups and emission sources; however, it has a high level of particulate matter concentration. In a situation where various green spaces creation projects for reducing particulate are being implemented, it is necessary to consider the vulnerable groups and emission sources and to present green space creation strategies for each space characteristic in order to increase the effectiveness of such projects. Therefore, this study is regarded as meaningful in suggesting a method for selecting a green area for reducing PM.